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Title: Method and apparatus for monitoring armature position in direct-current solenoids

Patent ·
OSTI ID:415767

A method for determining the position of an armature of a dc-powered solenoid is disclosed. Electrical circuitry is provided to introduce a small alternating current flow through the coil. As a result, the impedance and resistance of the solenoid coil can be measured to provide information indicative of the armature`s position. 5 figs.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
DOE Contract Number:
AC05-84OR21400
Assignee:
Martin Marietta Energy Systems, Inc., Oak Ridge, TN (United States)
Patent Number(s):
US 5,583,434/A/
Application Number:
PAN: 8-093,846
OSTI ID:
415767
Resource Relation:
Other Information: PBD: 10 Dec 1996
Country of Publication:
United States
Language:
English